Probably yes. While a bulb horn is fine for a cycle motor you'd need something more assertive for a Matchless.
D.C. horn for a battery? My other bikes have A.C. horns powered from the lighting coil - I have in the past bought the wrong type by mistake.
Edit: photo above appeared while I was typing - really you'd want a straight one to avoid water pooling and rusting it through.
Probably yes. While a bulb horn is fine for a cycle motor you'd need something more assertive for a Matchless.
D.C. horn for a battery? My other bikes have A.C. horns powered from the lighting coil - I have in the past bought the wrong type by mistake.
Edit: photo above appeared while I was typing - really you'd want a straight one to avoid water pooling and rusting it through.